船尾座（Puppis），于十八世纪由南船座拆分得来。南船座原是南天星座之一，后被拆分为四个单独的星座，分别是船帆座、船底座、船尾座和罗盘座。

托勒密本称船尾座、船帆座及船底座为同一星座（不包括罗盘座），叫做南船座（Argo Navis）。在十八世纪，天文学家认为南船座所占之天区过大，故将其拆开。南船座即阿格号（Argonauts），故事中伊阿宋带着五十个人乘阿格号到位于黑海的科尔基斯（Colchis）找金羊毛。

伊阿宋带着众多船员出航，当中包括双子座的卡斯托尔（Castor）和波吕杜克斯（Polydeuces / Pollux），乐师俄耳甫斯，建船者阿尔戈斯，后来连赫拉克勒斯也加入旅程。剧作家把阿格号描写成船坚炮利，而牛顿甚至将黄道十二宫与阿格号扯上关系。建船之时，雅典娜下令阿尔戈斯采佩利翁山（Pelion）的木材造船，宙斯也指示阿尔戈斯以多多纳（Dodona）之橡木建船首，那里的橡木赋有语言能力，在阿格号启航时，甚至听到橡木的哭声。

Puppis /ˈpʌpᵻs/ is a constellation in the southern sky. Puppis, the Poop Deck, was originally part of an over-large constellation, the ship of "Jason and the Argonauts", Argo Navis, which centuries after its initial description, was divided into three parts, the other two being Carina (the keel and hull), and Vela (the sails of the ship). Puppis is the largest of the three constellations in square degrees. It is one of the 88 modern constellations recognized by the International Astronomical Union.